On this day, 838 years ago, July 4, 1187 (May 26, 1187, the 1187 lunar calendar), the Battle of Harbin broke out. On July 4, 1187, the Battle of Harbin broke out. Saladin, the sultan of the Ayub Dynasty in Egypt, led 30,000 troops to set up an ambush in the valley near Hattin north of Jerusalem, surrounding King Baldwin V of Jerusalem and his subordinates 'nearly 20,000 crusader troops. They all annihilated, and the sacred object "True Cross" was also captured by the Muslim army. This war dealt a fatal blow to the Kingdom of Jerusalem. Saladin took advantage of the victory to conquer many important towns in succession. On October 2, he occupied the Holy City of Jerusalem, which had been occupied by the Crusaders for 87 years, thus fundamentally shaking the Crusaders 'rule in the Middle East. foundation. Comments: It was just a small tug between the Crusaders and Muslims